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2D-14-16,2D-16-18,2D-18-20,2D-20-22,2D-30-36,2D-36-52,2D-42-52,内螺纹转换接头
2D-20-24,2D-22-24,2D-14-30,2D-16-30,2D-18-30,2D-20-30,2D-22-30,2D-24-30,2D-14-36,
2D-16-36,2D-18-36,2D-20-36,2D-22-36,2D-24-36,2D-14-42,2D-16-42,2D-18-42,2D-20-42,
2D-22-42,2D-24-42,2D-30-36,2D-30-42,2D-36-42,2D-14-52,2D-16-52,2D-18-52,2D-20-52,
2D-22-52,2D-24-52,2D-30-52,
